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Li W, Yu J, Yang Y, Wang J, Liu Y, Wang J, Hu J, Yuan Y, Du Z. M 3 subtype of muscarinic acetylcholine receptor inhibits cardiac fibrosis via targeting microRNA-29b/beta-site app cleaving enzyme 1 axis. Cardiovasc Diagn Ther 2024; 14:143-157. [PMID: 38434562 PMCID: PMC10904290 DOI: 10.21037/cdt-23-309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/24/2023] [Indexed: 03/05/2024]
Abstract
Background Previous studies have confirmed that choline exerts anti-fibrotic effect in the heart by activating the M3 subtype of muscarinic acetylcholine receptor (M3 receptor), but the mechanism remains to be clarified. MicroRNA-29b (miR-29b) plays an important role in the fibrotic process and can directly target collagen to resist myocardial fibrosis. This study investigated whether miR-29b is involved in the anti-fibrotic effect of activating M3 receptor. Methods Proliferation of cardiac fibroblasts was induced by transforming growth factor (TGF)-β1 in vitro. The expression of miR-29b in cardiac fibroblasts was detected by quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR). Protein levels of collagens I, connective tissue growth factor (CTGF), α-smooth muscle actin (α-SMA) and beta-site app cleaving enzyme 1 (BACE1) were determined by Western blot analysis. Fibroblast-myofibroblast transition was identified by immunofluorescence staining. Proliferation and migration of cardiac fibroblasts as indicated by transwell and scratch assays. Results The expression of miR-29b decreased when treated with TGF-β1 (P=0.0389) and increased after choline stimulated (P=0.0001). Overexpression of miR-29b could reverse the high expression of collagen I (P<0.0001), α-SMA (P=0.0007), and CTGF (P=0.0038) induced by TGF-β1, whereas inhibition of miR-29b had a tendency to even further increase the expression of fibrosis markers. Meanwhile, inhibition of miR-29b could reverse the anti-fibrotic effect of choline, increasing the expression of collagen I (P=0.0040), α-SMA (P=0.0001), and CTGF (P=0.0185), and promoting the fibroblast proliferation and migration. Moreover, BACE1 protein level, increased after TGF-β1 treatment (P=0.0037) and reversed by overexpression of miR-29b (P=0.0493). Choline could reduce the increase of BACE1 induced by TGF-β1 (P=0.0264), and 4-diphenylacetoxy-N-methyl-piperidine methiodide (4-DAMP) increased the expression of BACE1 (P=0.0060). Furthermore, overexpression of BACE1 could reverse the protective effect of miR-29b in cardiac fibrosis, increasing the protein level of collagen I (P=0.0404). Conclusions The results suggested that M3 receptor activation could exert cardioprotective effects in cardiac fibrosis by mediating miR-29b/BACE1 axis.
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Affiliation(s)
- Wen Li
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jie Yu
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yilian Yang
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jia Wang
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yunqi Liu
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jiapan Wang
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Juan Hu
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ye Yuan
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
- National Key Laboratory of Frigid Zone Cardiovascular Disease, Harbin, China
| | - Zhimin Du
- Institute of Clinical Pharmacy, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China
- Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
- National Key Laboratory of Frigid Zone Cardiovascular Disease, Harbin, China
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2
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Schunke KJ, Rodriguez J, Dyavanapalli J, Schloen J, Wang X, Escobar J, Kowalik G, Cheung EC, Ribeiro C, Russo R, Alber BR, Dergacheva O, Chen SW, Murillo-Berlioz AE, Lee KB, Trachiotis G, Entcheva E, Brantner CA, Mendelowitz D, Kay MW. Outcomes of hypothalamic oxytocin neuron-driven cardioprotection after acute myocardial infarction. Basic Res Cardiol 2023; 118:43. [PMID: 37801130 PMCID: PMC10558415 DOI: 10.1007/s00395-023-01013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 10/07/2023]
Abstract
Altered autonomic balance is a hallmark of numerous cardiovascular diseases, including myocardial infarction (MI). Although device-based vagal stimulation is cardioprotective during chronic disease, a non-invasive approach to selectively stimulate the cardiac parasympathetic system immediately after an infarction does not exist and is desperately needed. Cardiac vagal neurons (CVNs) in the brainstem receive powerful excitation from a population of neurons in the paraventricular nucleus (PVN) of the hypothalamus that co-release oxytocin (OXT) and glutamate to excite CVNs. We tested if chemogenetic activation of PVN-OXT neurons following MI would be cardioprotective. The PVN of neonatal rats was transfected with vectors to selectively express DREADDs within OXT neurons. At 6 weeks of age, an MI was induced and DREADDs were activated with clozapine-N-oxide. Seven days following MI, patch-clamp electrophysiology confirmed the augmented excitatory neurotransmission from PVN-OXT neurons to downstream nuclei critical for parasympathetic activity with treatment (43.7 ± 10 vs 86.9 ± 9 pA; MI vs. treatment), resulting in stark improvements in survival (85% vs. 95%; MI vs. treatment), inflammation, fibrosis assessed by trichrome blue staining, mitochondrial function assessed by Seahorse assays, and reduced incidence of arrhythmias (50% vs. 10% cumulative incidence of ventricular fibrillation; MI vs. treatment). Myocardial transcriptomic analysis provided molecular insight into potential cardioprotective mechanisms, which revealed the preservation of beneficial signaling pathways, including muscarinic receptor activation, in treated animals. These comprehensive results demonstrate that the PVN-OXT network could be a promising therapeutic target to quickly activate beneficial parasympathetic-mediated cellular pathways within the heart during the early stages of infarction.
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Affiliation(s)
- Kathryn J Schunke
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA.
- Department of Anatomy, Biochemistry and Physiology, University of Hawaii, 651 Ilalo St, Honolulu, HI, BSB 211 96813, USA.
| | - Jeannette Rodriguez
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Jhansi Dyavanapalli
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - John Schloen
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Xin Wang
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Joan Escobar
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Grant Kowalik
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Emily C Cheung
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Caitlin Ribeiro
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Rebekah Russo
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Bridget R Alber
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Olga Dergacheva
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Sheena W Chen
- Division of Cardiothoracic Surgery and Cardiothoracic Research, Veterans Affairs Medical Center, 50 Irving St. NW, Washington, DC, 20422, USA
| | - Alejandro E Murillo-Berlioz
- Division of Cardiothoracic Surgery and Cardiothoracic Research, Veterans Affairs Medical Center, 50 Irving St. NW, Washington, DC, 20422, USA
| | - Kyongjune B Lee
- Division of Cardiothoracic Surgery and Cardiothoracic Research, Veterans Affairs Medical Center, 50 Irving St. NW, Washington, DC, 20422, USA
| | - Gregory Trachiotis
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
- Division of Cardiothoracic Surgery and Cardiothoracic Research, Veterans Affairs Medical Center, 50 Irving St. NW, Washington, DC, 20422, USA
| | - Emilia Entcheva
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA
| | - Christine A Brantner
- The GWU Nanofabrication and Imaging Center, 800 22nd Street NW, Washington, DC, 20052, USA
| | - David Mendelowitz
- Department of Pharmacology and Physiology, George Washington University, Suite 640 Ross Hall, 2300 Eye St. NW, Washington, DC, 20052, USA.
| | - Matthew W Kay
- Department of Biomedical Engineering, George Washington University, Suite 5000 Science and Engineering Hall, 800 22nd Street NW, Washington, DC, 20052, USA.
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Advances of Traditional Chinese Medicine Regulating Connexin43 in the Prevention and Treatment of Myocardial Infarction. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:8583285. [PMID: 34819986 PMCID: PMC8608513 DOI: 10.1155/2021/8583285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/12/2021] [Accepted: 10/25/2021] [Indexed: 11/18/2022]
Abstract
Gap junctions are the main form of interaction between cardiomyocytes, through which the electrochemical activities between cardiomyocytes can be synchronized to maintain the normal function of the heart. Connexins are the basis of gap junctions. Changes in the expression, structural changes (e.g., phosphorylation and dephosphorylation), and distribution of connexins can affect the normal electrophysiological activities of the heart. Myocardial infarction (MI) and concurrent arrhythmia, shock, or heart failure can endanger life. The structural and functional damage of connexin (Cx) 43 in cardiomyocytes is a central part of the pathological progression of MI and is one of the main pathological mechanisms of arrhythmia after MI. Therefore, increasing Cx43 expression has become one of the main measures to prevent MI. Also, intervention in Cx43 expression can improve the structural and electrical remodeling of the myocardium to improve MI prognosis. Here, research progress of Cx43 in MI and its prevention and treatment using Traditional Chinese Medicine formulations is reviewed.
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Cavalcante GL, Brognara F, Oliveira LVDC, Lataro RM, Durand MDT, Oliveira AP, Nóbrega ACL, Salgado HC, Sabino JPJ. Benefits of pharmacological and electrical cholinergic stimulation in hypertension and heart failure. Acta Physiol (Oxf) 2021; 232:e13663. [PMID: 33884761 DOI: 10.1111/apha.13663] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/12/2021] [Accepted: 04/06/2021] [Indexed: 12/11/2022]
Abstract
Systemic arterial hypertension and heart failure are cardiovascular diseases that affect millions of individuals worldwide. They are characterized by a change in the autonomic nervous system balance, highlighted by an increase in sympathetic activity associated with a decrease in parasympathetic activity. Most therapeutic approaches seek to treat these diseases by medications that attenuate sympathetic activity. However, there is a growing number of studies demonstrating that the improvement of parasympathetic function, by means of pharmacological or electrical stimulation, can be an effective tool for the treatment of these cardiovascular diseases. Therefore, this review aims to describe the advances reported by experimental and clinical studies that addressed the potential of cholinergic stimulation to prevent autonomic and cardiovascular imbalance in hypertension and heart failure. Overall, the published data reviewed demonstrate that the use of central or peripheral acetylcholinesterase inhibitors is efficient to improve the autonomic imbalance and hemodynamic changes observed in heart failure and hypertension. Of note, the baroreflex and the vagus nerve activation have been shown to be safe and effective approaches to be used as an alternative treatment for these cardiovascular diseases. In conclusion, pharmacological and electrical stimulation of the parasympathetic nervous system has the potential to be used as a therapeutic tool for the treatment of hypertension and heart failure, deserving to be more explored in the clinical setting.
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Affiliation(s)
- Gisele L. Cavalcante
- Graduate Program in Pharmaceutical Sciences Department of Biophysics and Physiology Federal University of Piaui Teresina PI Brazil
- Department of Pharmacology Ribeirão Preto Medical School University of São Paulo Ribeirão Preto SP Brazil
| | - Fernanda Brognara
- Department of Physiology Ribeirão Preto Medical School University of São Paulo Ribeirão Preto SP Brazil
| | - Lucas Vaz de C. Oliveira
- Graduate Program in Pharmaceutical Sciences Department of Biophysics and Physiology Federal University of Piaui Teresina PI Brazil
| | - Renata M. Lataro
- Department of Physiological Sciences Center of Biological Sciences Federal University of Santa Catarina Florianópolis SP Brazil
| | | | - Aldeidia P. Oliveira
- Graduate Program in Pharmacology Department of Biophysics and Physiology Federal University of Piaui Teresina PI Brazil
| | | | - Helio C. Salgado
- Department of Physiology Ribeirão Preto Medical School University of São Paulo Ribeirão Preto SP Brazil
| | - João Paulo J. Sabino
- Graduate Program in Pharmaceutical Sciences Department of Biophysics and Physiology Federal University of Piaui Teresina PI Brazil
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5
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Guo J, Hang P, Yu J, Li W, Zhao X, Sun Y, Fan Z, Du Z. The association between RGS4 and choline in cardiac fibrosis. Cell Commun Signal 2021; 19:46. [PMID: 33892733 PMCID: PMC8063380 DOI: 10.1186/s12964-020-00682-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 11/03/2020] [Indexed: 11/10/2022] Open
Abstract
Background Myocardial fibrosis is caused by the adverse and powerful remodeling of the heart secondary to the death of cardiomyocytes after myocardial infarction. Regulators of G protein Signaling (RGS) 4 is involved in cardiac diseases through regulating G protein-coupled receptors (GPCRs). Methods Cardiac fibrosis models were established through cardiac fibroblasts (CFs) treatment with transforming growth factor (TGF)-β1 in vitro and mice subjected to myocardial infarction in vivo. The mRNA expression of RGS4, collagen I/III and α-SMA detected by qRT-PCR. Protein level of RGS4, collagen I, CTGF and α-SMA detected by Western blot. The ejection fraction (EF%) and fractional shortening (FS%) of mice were measured by echocardiography. Collagen deposition of mice was tested by Masson staining. Results The expression of RGS4 increased in CFs treatment with TGF-β1 and in MI mice. The model of cardiac fibrosis detected by qRT-PCR and Western blot. It was demonstrated that inhibition of RGS4 expression improved cardiac fibrosis by transfection with small interfering RNA in CFs and injection with lentivirus shRNA in mice. The protective effect of choline against cardiac fibrosis was counteracted by overexpression of RGS4 in vitro and in vivo. Moreover, choline inhibited the protein level of TGF-β1, p-Smad2/3, p-p38 and p-ERK1/2 in CFs treated with TGF-β1, which were restored by RGS4 overexpression. Conclusion This study demonstrated that RGS4 promoted cardiac fibrosis and attenuated the anti-cardiac fibrosis of choline. RGS4 may weaken anti-cardiac fibrosis of choline through TGF-β1/Smad and MAPK signaling pathways. ![]()
Video Abstract: Video Byte of this article
Supplementary Information The online version contains supplementary material availlable at 10.1186/s12964-020-00682-y.
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Affiliation(s)
- Jing Guo
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Pengzhou Hang
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Jie Yu
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Wen Li
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Xiuye Zhao
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Yue Sun
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Ziyi Fan
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Zhimin Du
- Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, 150086, People's Republic of China. .,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, 150081, People's Republic of China. .,State Key Laboratory of Quality Reserch in Chinese Medicines, Macau University of Science and Technology, Macau, Macau, 150086, People's Republic of China.
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6
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Khuanjing T, Palee S, Kerdphoo S, Jaiwongkam T, Anomasiri A, Chattipakorn SC, Chattipakorn N. Donepezil attenuated cardiac ischemia/reperfusion injury through balancing mitochondrial dynamics, mitophagy, and autophagy. Transl Res 2021; 230:82-97. [PMID: 33137536 DOI: 10.1016/j.trsl.2020.10.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/06/2020] [Accepted: 10/28/2020] [Indexed: 02/08/2023]
Abstract
Cardiac autonomic imbalance including sympathetic overactivity and diminished parasympathetic activity is associated with left ventricular (LV) dysfunction in cases of cardiac ischemia/reperfusion (I/R) injury. Electrical stimulation to increase vagal activity has been shown to reduce infarct size and decrease fatal arrhythmias in cardiac I/R injury. However, the benefits of a parasympathomimetic drug on the heart during I/R are unclear. We hypothesized that administration of donepezil provides cardioprotection in cardiac I/R injury via reducing cellular apoptosis, oxidative stress, mitochondrial dysfunction, mitochondrial dynamic imbalance, increasing autophagy, and mitophagy. Fifty-four male Wistar rats were randomly assigned into sham and I/R groups. Acute cardiac I/R injury was induced by 30-minutes left anterior descending (LAD) coronary artery occlusion followed by 120-minutes reperfusion. These rats with induced I/R injury were randomly assigned to be treated with either: (1) Saline (vehicle group) or donepezil 3 mg/kg via intravenous injection given (2) before ischemia, (3) during ischemia, or (4) at the onset of reperfusion. Rats with cardiac I/R injury showed an increase in infarct size and arrhythmia score, LV dysfunction, impaired mitochondrial dynamic balance, autophagy and mitophagy, mitochondrial dysfunction, and increased apoptosis. All the donepezil-treated rats, regardless of the time of administration, showed a similar reduction in these impairments, and rebalancing in cardiac mitochondrial dynamics, leading to reduced myocardial infarct size and arrhythmia, and improved LV function. These findings suggested that donepezil effectively protected the heart against I/R injury through cardiac mitochondrial protection regardless of the time of administration.
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Affiliation(s)
- Thawatchai Khuanjing
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Siripong Palee
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Sasiwan Kerdphoo
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Thidarat Jaiwongkam
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Anawin Anomasiri
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Siriporn C Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.
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7
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He X, Deng J, Yu XJ, Yang S, Yang Y, Zang WJ. Activation of M3AChR (Type 3 Muscarinic Acetylcholine Receptor) and Nrf2 (Nuclear Factor Erythroid 2-Related Factor 2) Signaling by Choline Alleviates Vascular Smooth Muscle Cell Phenotypic Switching and Vascular Remodeling. Arterioscler Thromb Vasc Biol 2020; 40:2649-2664. [PMID: 32938216 DOI: 10.1161/atvbaha.120.315146] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Phenotypic switching of vascular smooth muscle cells (VSMCs) plays a critical role in atherosclerosis, vascular restenosis, and hypertension. Choline exerts cardioprotective effects; however, little is known about its effects on VSMC phenotypic switching and vascular remodeling. Here, we investigated whether choline modulates VSMC phenotypic changes and explored the underlying mechanisms. Approach and Results: In cultured VSMCs, choline promoted Nrf2 (nuclear factor erythroid 2-related factor 2) nuclear translocation, inducing the expression of HO-1 (heme oxygenase-1) and NQO-1 (NAD[P]H quinone oxidoreductase-1). Consequently, choline ameliorated Ang II (angiotensin II)-induced increases in NOX (NAD[P]H oxidase) expression and the mitochondrial reactive oxygen species level, thereby attenuating Ang II-induced VSMC phenotypic switching, proliferation, and migration, presumably via M3AChRs (type 3 muscarinic acetylcholine receptors). Downregulation of M3AChR or Nrf2 diminished choline-mediated upregulation of Nrf2, HO-1, and NQO-1 expression, as well as inhibition of VSMC phenotypic transformation, suggesting that M3AChR and Nrf2 activation are responsible for the protective effects of choline. Moreover, activation of the Nrf2 pathway by sulforaphane suppressed Ang II-induced VSMC phenotypic switching and proliferation, indicating that Nrf2 is a key regulator of VSMC phenotypic switching and vascular homeostasis. In a rat model of abdominal aortic constriction in vivo, choline attenuated VSMC phenotypic transformation and vascular remodeling in a manner related to activation of the Nrf2 pathway. CONCLUSIONS These results reveal that choline impedes VSMC phenotypic switching, proliferation, migration, and vascular remodeling by activating M3AChR and Nrf2-antioxidant signaling and suggest a novel role for Nrf2 in VSMC phenotypic modulation.
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Affiliation(s)
- Xi He
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
| | - Juan Deng
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
| | - Xiao-Jiang Yu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
| | - Si Yang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
| | - Yang Yang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
| | - Wei-Jin Zang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China
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8
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Xu M, Xue RQ, Lu Y, Yong SY, Wu Q, Cui YL, Zuo XT, Yu XJ, Zhao M, Zang WJ. Choline ameliorates cardiac hypertrophy by regulating metabolic remodelling and UPRmt through SIRT3-AMPK pathway. Cardiovasc Res 2020; 115:530-545. [PMID: 30165480 DOI: 10.1093/cvr/cvy217] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 07/01/2018] [Accepted: 08/22/2018] [Indexed: 02/06/2023] Open
Abstract
AIMS Cardiac hypertrophy is characterized by a shift in metabolic substrate utilization, but the molecular events underlying the metabolic remodelling remain poorly understood. We explored metabolic remodelling and mitochondrial dysfunction in cardiac hypertrophy and investigated the cardioprotective effects of choline. METHODS AND RESULTS The experiments were conducted using a model of ventricular hypertrophy by partially banding the abdominal aorta of Sprague Dawley rats. Cardiomyocyte size and cardiac fibrosis were significantly increased in hypertrophic hearts. In vitro cardiomyocyte hypertrophy was induced by exposing neonatal rat cardiomyocytes to angiotensin II (Ang II) (10-6 M, 24 h). Choline attenuated the mito-nuclear protein imbalance and activated the mitochondrial-unfolded protein response (UPRmt) in the heart, thereby preserving the ultrastructure and function of mitochondria in the context of cardiac hypertrophy. Moreover, choline inhibited myocardial metabolic dysfunction by promoting the expression of proteins involved in ketone body and fatty acid metabolism in response to pressure overload, accompanied by the activation of sirtuin 3/AMP-activated protein kinase (SIRT3-AMPK) signalling. In vitro analyses demonstrated that SIRT3 siRNA diminished choline-mediated activation of ketone body metabolism and UPRmt, as well as inhibition of hypertrophic signals. Intriguingly, serum from choline-treated abdominal aorta banding models (where β-hydroxybutyrate was increased) attenuated Ang II-induced myocyte hypertrophy, which indicates that β-hydroxybutyrate is important for the cardioprotective effects of choline. CONCLUSION Choline attenuated cardiac dysfunction by modulating the expression of proteins involved in ketone body and fatty acid metabolism, and induction of UPRmt; this was likely mediated by activation of the SIRT3-AMPK pathway. Taken together, these results identify SIRT3-AMPK as a key cardiac transcriptional regulator that helps orchestrate an adaptive metabolic response to cardiac stress. Choline treatment may represent a new therapeutic strategy for optimizing myocardial metabolism in the context of hypertrophy and heart failure.
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Affiliation(s)
- Man Xu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Run-Qing Xue
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Yi Lu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Su-Yun Yong
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Qing Wu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Yan-Ling Cui
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Xiao-Ting Zuo
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Xiao-Jiang Yu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Ming Zhao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
| | - Wei-Jin Zang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, Shannxi, PR China
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9
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Khuanjing T, Palee S, Chattipakorn SC, Chattipakorn N. The effects of acetylcholinesterase inhibitors on the heart in acute myocardial infarction and heart failure: From cells to patient reports. Acta Physiol (Oxf) 2020; 228:e13396. [PMID: 31595611 DOI: 10.1111/apha.13396] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/30/2019] [Accepted: 09/28/2019] [Indexed: 12/12/2022]
Abstract
Cardiovascular diseases remain a major cause of morbidity and mortality worldwide. Cardiovascular diseases such as acute myocardial infarction, ischaemia/reperfusion injury and heart failure are associated with cardiac autonomic imbalance characterized by sympathetic overactivity and parasympathetic withdrawal from the heart. Increased parasympathetic activity by electrical vagal nerve stimulation has been shown to provide beneficial effects in the case of cardiovascular diseases in both animals and patients by improving autonomic function, cardiac remodelling and mitochondrial function. However, clinical limitations for electrical vagal nerve stimulation exist because of its invasive nature, costly equipment and limited clinical validation. Therefore, novel therapeutic approaches which moderate parasympathetic activities could be beneficial for in the case of cardiovascular disease. Acetylcholinesterase inhibitors inhibit acetylcholinesterase and hence increase cholinergic transmission. Recent studies have reported that acetylcholinesterase inhibitors improve autonomic function and cardiac function in cardiovascular disease models. Despite its potential clinical benefits for cardiovascular disease patients, the role of acetylcholinesterase inhibitors in acute myocardial infarction and heart failure remediation remains unclear. This article comprehensively reviews the effects of acetylcholinesterase inhibitors on the heart in acute myocardial infarction and heart failure scenarios from in vitro and in vivo studies to clinical reports. The mechanisms involved are also discussed in this review.
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Affiliation(s)
- Thawatchai Khuanjing
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Cardiac Electrophysiology Unit Department of Physiology Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
| | - Siripong Palee
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
| | - Siriporn C. Chattipakorn
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
- Department of Oral Biology and Diagnostic Sciences Faculty of Dentistry Chiang Mai University Chiang Mai Thailand
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Cardiac Electrophysiology Unit Department of Physiology Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
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10
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Zhao L, Chen T, Hang P, Li W, Guo J, Pan Y, Du J, Zheng Y, Du Z. Choline Attenuates Cardiac Fibrosis by Inhibiting p38MAPK Signaling Possibly by Acting on M 3 Muscarinic Acetylcholine Receptor. Front Pharmacol 2019; 10:1386. [PMID: 31849653 PMCID: PMC6900736 DOI: 10.3389/fphar.2019.01386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 10/31/2019] [Indexed: 01/08/2023] Open
Abstract
Choline has been reported to produce a variety of cellular functions including cardioprotection via activating M3 muscarinic acetylcholine receptor (M3R) under various insults. However, whether choline offers similar beneficial effects via the same mechanism in cardiac fibrosis remained unexplored. The present study aimed to investigate the effects of choline on cardiac fibrosis and the underlying signaling mechanisms, particularly the possible involvement of M3R. Transverse aortic constriction (TAC) mouse model was established to simulate the cardiac fibrosis. Transforming growth factor (TGF)-β1 treatment was employed to induce proliferation of cardiac fibroblasts in vitro. Choline chloride and M3R antagonist 4-diphenylacetoxy-N-methylpiperidine methiodide (4-DAMP) were used to unravel the potential role of M3R. Cardiac function was assessed by echocardiography and interstitial fibrosis was quantified by Masson staining. Protein levels of collagens I and III were determined by Western blot analysis. The role of M3R in the proliferation cardiac fibroblasts was validated by silencing M3R with specific small interference RNA (siRNA). Furthermore, the mitogen-activated protein kinase (MAPK) signaling pathway including p38MAPK and ERK1/2 as well as the TGF-β1/Smad pathway were analyzed. M3R protein was found abundantly in cardiac fibroblasts. M3R protein level, as identified by Western blotting, was higher in mice with excessive cardiac fibrosis and in TGF-β1-induced cardiac fibrosis as well. Choline significantly inhibited interstitial fibrosis, and this beneficial action was reversed by 4-DAMP. Production of collagens I and III was reduced after choline treatment but restored by 4-DAMP. Expression silence of endogenous M3R using siRNA increased the level of collagen I. Furthermore, the TGF-β1/Smad2/3 and the p38MAPK pathways were both suppressed by choline. In summary, choline produced an anti-fibrotic effect both in vivo and in vitro by regulating the TGF-β1/Smad2/3 and p38MAPK pathways. These findings unraveled a novel pharmacological property of choline linked to M3R, suggesting that choline regulates cardiac fibrosis and the associated heart diseases possibly by acting on M3R.
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Affiliation(s)
- Lihui Zhao
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Tingting Chen
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Pengzhou Hang
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Wen Li
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jing Guo
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yang Pan
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jingjing Du
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yuyang Zheng
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Zhimin Du
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University (The University Key Laboratory of Drug Research, Heilongjiang Province), Harbin, China.,Department of Clinical Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China.,State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau, China
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11
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Aghaei M, Motallebnezhad M, Ghorghanlu S, Jabbari A, Enayati A, Rajaei M, Pourabouk M, Moradi A, Alizadeh AM, Khori V. Targeting autophagy in cardiac ischemia/reperfusion injury: A novel therapeutic strategy. J Cell Physiol 2019; 234:16768-16778. [PMID: 30807647 DOI: 10.1002/jcp.28345] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/17/2019] [Accepted: 01/22/2019] [Indexed: 12/31/2022]
Abstract
Acute myocardial infarction (AMI) is one of the leading causes of morbidity worldwide. Myocardial reperfusion is known as an effective therapeutic choice against AMI. However, reperfusion of blood flow induces ischemia/reperfusion (I/R) injury through different complex processes including ion accumulation, disruption of mitochondrial membrane potential, the formation of reactive oxygen species, and so forth. One of the processes that gets activated in response to I/R injury is autophagy. Indeed, autophagy acts as a "double-edged sword" in the pathology of myocardial I/R injury and there is a controversy about autophagy being beneficial or detrimental. On the basis of the autophagy effect and regulation on myocardial I/R injury, many studies targeted it as a therapeutic strategy. In this review, we discuss the role of autophagy in I/R injury and its targeting as a therapeutic strategy.
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Affiliation(s)
- Mehrdad Aghaei
- Rheumatology Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Morteza Motallebnezhad
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Student Research Committee, Iran University of Medical Sciences, Tehran, Iran
| | - Sajjad Ghorghanlu
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ali Jabbari
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ayesheh Enayati
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,Department of Pharmacognosy, Faculty of Pharmacy and Medicinal Plants Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Rajaei
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mona Pourabouk
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Alireza Moradi
- Department of Physiology, Medical School, Ardabil University of Medical Sciences, Ardabil, Iran
| | | | - Vahid Khori
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
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12
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Liu L, Zhao M, Yu X, Zang W. Pharmacological Modulation of Vagal Nerve Activity in Cardiovascular Diseases. Neurosci Bull 2019; 35:156-166. [PMID: 30218283 PMCID: PMC6357265 DOI: 10.1007/s12264-018-0286-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/13/2018] [Indexed: 01/17/2023] Open
Abstract
Cardiovascular diseases are life-threatening illnesses with high morbidity and mortality. Suppressed vagal (parasympathetic) activity and increased sympathetic activity are involved in these diseases. Currently, pharmacological interventions primarily aim to inhibit over-excitation of sympathetic nerves, while vagal modulation has been largely neglected. Many studies have demonstrated that increased vagal activity reduces cardiovascular risk factors in both animal models and human patients. Therefore, the improvement of vagal activity may be an alternate approach for the treatment of cardiovascular diseases. However, drugs used for vagus nerve activation in cardiovascular diseases are limited in the clinic. In this review, we provide an overview of the potential drug targets for modulating vagal nerve activation, including muscarinic, and β-adrenergic receptors. In addition, vagomimetic drugs (such as choline, acetylcholine, and pyridostigmine) and the mechanism underlying their cardiovascular protective effects are also discussed.
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Affiliation(s)
- Longzhu Liu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China
| | - Ming Zhao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China
| | - Xiaojiang Yu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China
| | - Weijin Zang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China.
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13
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Saw EL, Kakinuma Y, Fronius M, Katare R. The non-neuronal cholinergic system in the heart: A comprehensive review. J Mol Cell Cardiol 2018; 125:129-139. [PMID: 30343172 DOI: 10.1016/j.yjmcc.2018.10.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/24/2018] [Accepted: 10/14/2018] [Indexed: 01/01/2023]
Abstract
The autonomic influences on the heart have a ying-yang nature, albeit oversimplified, the interplay between the sympathetic and parasympathetic system (known as the cholinergic system) is often complex and remain poorly understood. Recently, the heart has been recognized to consist of neuronal and non-neuronal cholinergic system (NNCS). The existence of cardiac NNCS has been confirmed by the presence of cholinergic markers in the cardiomyocytes, which are crucial for synthesis (choline acetyltransferase, ChAT), storage (vesicular acetylcholine transporter, VAChT), reuptake of choline for synthesis (high-affinity choline transporter, CHT1) and degradation (acetylcholinesterase, AChE) of acetylcholine (ACh). The non-neuronal ACh released from cardiomyocytes is believed to locally regulate some of the key physiological functions of the heart, such as regulation of heart rate, offsetting hypertrophic signals, maintenance of action potential propagation as well as modulation of cardiac energy metabolism via the muscarinic ACh receptor in an auto/paracrine manner. Apart from this, several studies have also provided evidence for the beneficial role of ACh released from cardiomyocytes against cardiovascular diseases such as sympathetic hyperactivity-induced cardiac remodeling and dysfunction as well as myocardial infarction, confirming the important role of NNCS in disease prevention. In this review, we aim to provide a fundamental overview of cardiac NNCS, and information about its physiological role, regulatory factors as well as its cardioprotective effects. Finally, we propose the different approaches to target cardiac NNCS as an adjunctive treatment to specifically address the withdrawal of neuronal cholinergic system in cardiovascular disease such as heart failure.
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Affiliation(s)
- Eng Leng Saw
- Department of Physiology-HeartOtago, School of Biomedical Sciences, University of Otago, New Zealand
| | - Yoshihiko Kakinuma
- Department of Physiology (Bioregulatory Science), Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Martin Fronius
- Department of Physiology-HeartOtago, School of Biomedical Sciences, University of Otago, New Zealand.
| | - Rajesh Katare
- Department of Physiology-HeartOtago, School of Biomedical Sciences, University of Otago, New Zealand.
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14
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Intachai K, C Chattipakorn S, Chattipakorn N, Shinlapawittayatorn K. Revisiting the Cardioprotective Effects of Acetylcholine Receptor Activation against Myocardial Ischemia/Reperfusion Injury. Int J Mol Sci 2018; 19:ijms19092466. [PMID: 30134547 PMCID: PMC6164157 DOI: 10.3390/ijms19092466] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 08/15/2018] [Accepted: 08/18/2018] [Indexed: 12/19/2022] Open
Abstract
Acute myocardial infarction (AMI) is the most common cause of acute myocardial injury and its most clinically significant form. The most effective treatment for AMI is to restore an adequate coronary blood flow to the ischemic myocardium as quickly as possible. However, reperfusion of an ischemic region can induce cardiomyocyte death, a phenomenon termed “myocardial ischemia/reperfusion (I/R) injury”. Disruption of cardiac parasympathetic (vagal) activity is a common hallmark of a variety of cardiovascular diseases including AMI. Experimental studies have shown that increased vagal activity exerts cardioprotective effects against myocardial I/R injury. In addition, acetylcholine (ACh), the principle cardiac vagal neurotransmitter, has been shown to replicate the cardioprotective effects of cardiac ischemic conditioning. Moreover, studies have shown that cardiomyocytes can synthesize and secrete ACh, which gives further evidence concerning the importance of the non-neuronal cholinergic signaling cascades. This suggests that the activation of ACh receptors is involved in cardioprotection against myocardial I/R injury. There are two types of ACh receptors (AChRs), namely muscarinic and nicotinic receptors (mAChRs and nAChRs, respectively). However, the effects of AChRs activation in cardioprotection during myocardial I/R are still not fully understood. In this review, we summarize the evidence suggesting the association between AChRs activation with both electrical and pharmacological interventions and the cardioprotection during myocardial I/R, as well as outline potential mechanisms underlying these cardioprotective effects.
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Affiliation(s)
- Kannaporn Intachai
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Center of Excellence in Cardiac Electrophysiology, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Siriporn C Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Center of Excellence in Cardiac Electrophysiology, Chiang Mai University, Chiang Mai 50200, Thailand.
- Department of Oral Biology and Diagnostic Science, Faculty of Dentistry, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Center of Excellence in Cardiac Electrophysiology, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Krekwit Shinlapawittayatorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
- Center of Excellence in Cardiac Electrophysiology, Chiang Mai University, Chiang Mai 50200, Thailand.
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15
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Headrick JP, Peart JN, Budiono BP, Shum DH, Neumann DL, Stapelberg NJ. The heartbreak of depression: ‘Psycho-cardiac’ coupling in myocardial infarction. J Mol Cell Cardiol 2017; 106:14-28. [DOI: 10.1016/j.yjmcc.2017.03.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/27/2017] [Accepted: 03/29/2017] [Indexed: 12/25/2022]
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16
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Choline ameliorates cardiovascular damage by improving vagal activity and inhibiting the inflammatory response in spontaneously hypertensive rats. Sci Rep 2017; 7:42553. [PMID: 28225018 PMCID: PMC5320519 DOI: 10.1038/srep42553] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/10/2017] [Indexed: 11/17/2022] Open
Abstract
Autonomic dysfunction and abnormal immunity lead to systemic inflammatory responses, which result in cardiovascular damage in hypertension. The aim of this report was to investigate the effects of choline on cardiovascular damage in hypertension. Eight-week-old male spontaneously hypertensive rats (SHRs) and Wistar-Kyoto rats were intraperitoneally injected with choline or vehicle (8 mg/kg/day). After 8 weeks, choline restored the cardiac function of the SHRs, as evidenced by decreased heart rate, systolic blood pressure, left ventricle systolic pressure, and ±dp/dtmax and increased ejection fraction and fractional shortening. Choline also ameliorated the cardiac hypertrophy of the SHRs, as indicated by reduced left ventricle internal dimensions and decreased cardiomyocyte cross-sectional area. Moreover, choline improved mesenteric arterial function and preserved endothelial ultrastructure in the SHRs. Notably, the protective effect of choline may be due to its anti-inflammatory effect. Choline downregulated expression of interleukin (IL)-6 and tumour necrosis factor-α and upregulated IL-10 in the mesenteric arteries of SHRs, possibly because of the inhibition of Toll-like receptor 4. Furthermore, choline restored baroreflex sensitivity and serum acetylcholine level in SHRs, thus indicating that choline improved vagal activity. This study suggests that choline elicits cardiovascular protective effects and may be useful as a potential adjunct therapeutic approach for hypertension.
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17
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Xue RQ, Sun L, Yu XJ, Li DL, Zang WJ. Vagal nerve stimulation improves mitochondrial dynamics via an M 3 receptor/CaMKKβ/AMPK pathway in isoproterenol-induced myocardial ischaemia. J Cell Mol Med 2017; 21:58-71. [PMID: 27491814 PMCID: PMC5192749 DOI: 10.1111/jcmm.12938] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/27/2016] [Indexed: 12/25/2022] Open
Abstract
Mitochondrial dynamics-fission and fusion-are associated with ischaemic heart disease (IHD). This study explored the protective effect of vagal nerve stimulation (VNS) against isoproterenol (ISO)-induced myocardial ischaemia in a rat model and tested whether VNS plays a role in preventing disorders of mitochondrial dynamics and function. Isoproterenol not only caused cardiac injury but also increased the expression of mitochondrial fission proteins [dynamin-related peptide1 (Drp1) and mitochondrial fission protein1 (Fis-1)) and decreased the expression of fusion proteins (optic atrophy-1 (OPA1) and mitofusins1/2 (Mfn1/2)], thereby disrupting mitochondrial dynamics and leading to increase in mitochondrial fragments. Interestingly, VNS restored mitochondrial dynamics through regulation of Drp1, Fis-1, OPA1 and Mfn1/2; enhanced ATP content and mitochondrial membrane potential; reduced mitochondrial permeability transition pore (MPTP) opening; and improved mitochondrial ultrastructure and size. Furthermore, VNS reduced the size of the myocardial infarction and ameliorated cardiomyocyte apoptosis and cardiac dysfunction induced by ISO. Moreover, VNS activated AMP-activated protein kinase (AMPK), which was accompanied by phosphorylation of Ca2+ /calmodulin-dependent protein kinase kinase β (CaMKKβ) during myocardial ischaemia. Treatment with subtype-3 of muscarinic acetylcholine receptor (M3 R) antagonist 4-diphenylacetoxy-N-methylpiperidine methiodide or AMPK inhibitor Compound C abolished the protective effects of VNS on mitochondrial dynamics and function, suggesting that M3 R/CaMKKβ/AMPK signalling are involved in mediating beneficial effects of VNS. This study demonstrates that VNS modulates mitochondrial dynamics and improves mitochondrial function, possibly through the M3 R/CaMKKβ/AMPK pathway, to attenuate ISO-induced cardiac damage in rats. Targeting mitochondrial dynamics may provide a novel therapeutic strategy in IHD.
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Affiliation(s)
- Run-Qing Xue
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Lei Sun
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Xiao-Jiang Yu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Dong-Ling Li
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Wei-Jin Zang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
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18
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Tapilina S, Abramochkin D. Decrease in the Sensitivity of Myocardium to M3 Muscarinic Receptor Stimulation during Postnatal Ontogenisis. Acta Naturae 2016; 8:127-31. [PMID: 27437147 PMCID: PMC4947996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Indexed: 11/13/2022] Open
Abstract
Type 3 muscarinic receptors (M3 receptors) participate in the mediation of cholinergic effects in mammalian myocardium, along with M2 receptors. However, myocardium of adult mammals demonstrates only modest electrophysiological effects in response to selective stimulation of M3 receptors which are hardly comparable to the effects produced by M2 stimulation. In the present study, the effects of selective M3 stimulation induced by application of the muscarinic agonist pilocarpine (10 μM) in the presence of the selective M2 blocker methoctramine (100 nM) on the action potential (AP) waveform were investigated in isolated atrial and ventricular preparations from newborn and 3-week-old rats and compared to those in preparations from adult rats. In the atrial myocardium, stimulation of M3 receptors produced a comparable reduction of AP duration in newborn and adult rats, while in 3-week-old rats the effect was negligible. In ventricular myocardial preparations from newborn rats, the effect of M3 stimulation was more than 3 times stronger compared to that from adult rats, while preparations from 3-week old rats demonstrated no definite effect, similarly to atrial preparations. In all studied types of cardiac preparations, the effects of M3 stimulation were eliminated by the selective M3 antagonist 4-DAMP (10 nM). The results of RT-PCR show that the amount of product of the M3 receptor gene decreases with the maturation of animals both in atrial and ventricular myocardium. We concluded that the contribution of M3 receptors to the mediation of cardiac cholinergic responses decreases during postnatal ontogenesis. These age-related changes may be associated with downregulation of M3 receptor gene expression.
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Affiliation(s)
- S.V. Tapilina
- Department of human and animal physiology, Lomonosov Moscow State University, Leninskie Gory 1 bldg. 12,119234,Moscow, Russia
- Department of physiology, Pirogov Russian National Research Medical University, Ministry of Healthcare of the Russian Federation, Ostrovityanova str. 1, 117997, Moscow, Russia
| | - D.V. Abramochkin
- Department of human and animal physiology, Lomonosov Moscow State University, Leninskie Gory 1 bldg. 12,119234,Moscow, Russia
- Department of physiology, Pirogov Russian National Research Medical University, Ministry of Healthcare of the Russian Federation, Ostrovityanova str. 1, 117997, Moscow, Russia
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19
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He X, Zhao M, Bi X, Sun L, Yu X, Zhao M, Zang W. Novel strategies and underlying protective mechanisms of modulation of vagal activity in cardiovascular diseases. Br J Pharmacol 2015; 172:5489-500. [PMID: 25378088 PMCID: PMC4667861 DOI: 10.1111/bph.13010] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 10/21/2014] [Accepted: 10/31/2014] [Indexed: 01/14/2023] Open
Abstract
Cardiovascular disease remains a major cause of disability and death worldwide. Autonomic imbalance, characterized by suppressed vagal (parasympathetic) activity and increased sympathetic activity, correlates with various pathological conditions, including heart failure, arrhythmia, ischaemia/reperfusion injury and hypertension. Conventionally, pharmacological interventions, such as β-blocker treatment, have primarily targeted suppressing sympathetic over-activation, while vagal modulation has always been neglected. Emerging evidence has documented the improvement of cardiac and vascular function mediated by the vagal nerve. Many investigators have tried to explore the effective ways to enhance vagal tone and normalize the autonomic nervous system. In this review, we attempt to give an overview of these therapeutic strategies, including direct vagal activation (electrical vagal stimulation, ACh administration and ACh receptor activation), pharmacological modulation (adenosine, cholinesterase inhibitors, statins) and exercise training. This overview provides valuable information for combination therapy, contributing to establishment of a comprehensive system on vagal modulation from the aspects of clinical application and lifestyle improvement. In addition, the mechanisms contributing to the benefits of enhancing vagal tone are diverse and have not yet been fully defined. We endeavour to outline the recent findings that advance our knowledge regarding the many favourable effects exerted by vagal activation: anti-inflammatory pathways, modulation of NOS and NO signalling, regulation of redox state, improvement of mitochondrial biogenesis and function, and potential calcium regulation. This review may help to develop novel therapeutic strategies targeting enhancing vagal activity for the treatment of cardiovascular diseases.
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Affiliation(s)
- Xi He
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Ming Zhao
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Xueyuan Bi
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Lei Sun
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Xiaojiang Yu
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Mei Zhao
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
| | - Weijin Zang
- Department of PharmacologyXi'an Jiaotong University Health Science CenterXi'anChina
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Lu XZ, Bi XY, He X, Zhao M, Xu M, Yu XJ, Zhao ZH, Zang WJ. Activation of M3 cholinoceptors attenuates vascular injury after ischaemia/reperfusion by inhibiting the Ca2+/calmodulin-dependent protein kinase II pathway. Br J Pharmacol 2015; 172:5619-33. [PMID: 25953628 DOI: 10.1111/bph.13183] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 03/24/2015] [Accepted: 04/20/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND AND PURPOSE The activation of M3 cholinoceptors (M3 receptors) by choline reduces cardiovascular risk, but it is unclear whether these receptors can regulate ischaemia/reperfusion (I/R)-induced vascular injury. Thus, the primary goal of the present study was to explore the effects of choline on the function of mesenteric arteries following I/R, with a major focus on Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) regulation. EXPERIMENTAL APPROACH Rats were given choline (10 mg · kg(-1), i.v.) and then the superior mesenteric artery was occluded for 60 min (ischaemia), followed by 90 min of reperfusion. The M3 receptor antagonist, 4-diphenylacetoxy-N-methylpiperidine methiodide (4-DAMP), was injected (0.12 μg · kg(-1), i.v.) 5 min prior to choline treatment. Vascular function was examined in rings of mesenteric arteries isolated after the reperfusion procedure. Vascular superoxide anion production, CaMKII and the levels of Ca(2+)-cycling proteins were also assessed. KEY RESULTS Choline treatment attenuated I/R-induced vascular dysfunction, blocked elevations in the levels of reactive oxygen species (ROS) and decreased the up-regulated expression of oxidised CaMKII and phosphorylated CaMKII. In addition, choline reversed the abnormal expression of Ca(2+)-cycling proteins, including Na(+)Ca(2+) exchanger, inositol 1,4,5-trisphosphate receptor, sarcoplasmic reticulum Ca(2+)-ATPase and phospholamban. All of these cholinergic effects of choline were abolished by 4-DAMP. CONCLUSIONS AND IMPLICATIONS Our data suggest that inhibition of the ROS-mediated CaMKII pathway and modulation of Ca(2+)-cycling proteins may be novel mechanisms underlying choline-induced vascular protection. These results represent a significant addition to the understanding of the pharmacological roles of M3 receptors in the vasculature, providing a new therapeutic strategy for I/R-induced vascular injury.
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Affiliation(s)
- Xing-Zhu Lu
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Xue-Yuan Bi
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Xi He
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Ming Zhao
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Man Xu
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Xiao-Jiang Yu
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Zheng-Hang Zhao
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Wei-Jin Zang
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi'an, China
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AIBA TAKESHI, NODA TAKASHI, HIDAKA ICHIRO, INAGAKI MASASHI, KATARE RAJESHG, ANDO MOTONORI, SUNAGAWA KENJI, SATO TAKAYUKI, SUGIMACHI MASARU. Acetylcholine Suppresses Ventricular Arrhythmias and Improves Conduction and Connexin-43 Properties During Myocardial Ischemia in Isolated Rabbit Hearts. J Cardiovasc Electrophysiol 2015; 26:678-85. [DOI: 10.1111/jce.12663] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 02/09/2015] [Accepted: 02/25/2015] [Indexed: 12/14/2022]
Affiliation(s)
- TAKESHI AIBA
- Division of Arrhythmia and Electrophysiology; Department of Cardiovascular Medicine
| | - TAKASHI NODA
- Division of Arrhythmia and Electrophysiology; Department of Cardiovascular Medicine
| | - ICHIRO HIDAKA
- Department of Cardiovascular Dynamics; Research Institute; National Cerebral and Cardiovascular Center Suita; Japan
| | - MASASHI INAGAKI
- Department of Cardiovascular Dynamics; Research Institute; National Cerebral and Cardiovascular Center Suita; Japan
| | - RAJESH G. KATARE
- Department of Cardiovascular Control; Kochi Medical School; Nankoku Japan
| | - MOTONORI ANDO
- Department of Cardiovascular Control; Kochi Medical School; Nankoku Japan
| | - KENJI SUNAGAWA
- Department of Cardiovascular Medicine; Kyushu University Graduate School of Medical Sciences; Fukuoka Japan
| | - TAKAYUKI SATO
- Department of Cardiovascular Control; Kochi Medical School; Nankoku Japan
| | - MASARU SUGIMACHI
- Department of Cardiovascular Dynamics; Research Institute; National Cerebral and Cardiovascular Center Suita; Japan
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22
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DeMazumder D, Kass DA, O'Rourke B, Tomaselli GF. Cardiac resynchronization therapy restores sympathovagal balance in the failing heart by differential remodeling of cholinergic signaling. Circ Res 2015; 116:1691-9. [PMID: 25733594 DOI: 10.1161/circresaha.116.305268] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Accepted: 03/02/2015] [Indexed: 12/29/2022]
Abstract
RATIONALE Cardiac resynchronization therapy (CRT) is the only heart failure (HF) therapy documented to improve left ventricular function and reduce mortality. The underlying mechanisms are incompletely understood. Although β-adrenergic signaling has been studied extensively, the effect of CRT on cholinergic signaling is unexplored. OBJECTIVE We hypothesized that remodeling of cholinergic signaling plays an important role in the aberrant calcium signaling and depressed contractile and β-adrenergic responsiveness in dyssynchronous HF that are restored by CRT. METHODS AND RESULTS Canine tachypaced dyssynchronous HF and CRT models were generated to interrogate responses specific to dyssynchronous versus resynchronized ventricular contraction during hemodynamic decompensation. Echocardiographic, electrocardiographic, and invasive hemodynamic data were collected from normal controls, dyssynchronous HF and CRT models. Left ventricular tissue was used for biochemical analyses and functional measurements (calcium transient, sarcomere shortening) from isolated myocytes (n=42-104 myocytes per model; 6-9 hearts per model). Human left ventricular myocardium was obtained for biochemical analyses from explanted failing (n=18) and nonfailing (n=7) hearts. The M2 subtype of muscarinic acetylcholine receptors was upregulated in human and canine HF compared with nonfailing controls. CRT attenuated the increased M2 subtype of muscarinic acetylcholine receptor expression and Gαi coupling and enhanced M3 subtype of muscarinic acetylcholine receptor expression in association with enhanced calcium cycling, sarcomere shortening, and β-adrenergic responsiveness. Despite model-dependent remodeling, cholinergic stimulation completely abolished isoproterenol-induced triggered activity in both dyssynchronous HF and CRT myocytes. CONCLUSIONS Remodeling of cholinergic signaling is a critical pathological component of human and canine HF. Differential remodeling of cholinergic signaling represents a novel mechanism for enhancing sympathovagal balance with CRT and may identify new targets for treatment of systolic HF.
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Affiliation(s)
- Deeptankar DeMazumder
- From the Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - David A Kass
- From the Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Brian O'Rourke
- From the Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Gordon F Tomaselli
- From the Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD.
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23
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Santos-Almeida FM, Girão H, da Silva CAA, Salgado HC, Fazan R. Cholinergic stimulation with pyridostigmine protects myocardial infarcted rats against ischemic-induced arrhythmias and preserves connexin43 protein. Am J Physiol Heart Circ Physiol 2015; 308:H101-7. [DOI: 10.1152/ajpheart.00591.2014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the effects of acute pyridostigmine (PYR) treatment, an acetylcholinesterase inhibitor, on arterial pressure (AP), heart rate (HR), cardiac sympathovagal balance, and the incidence of arrhythmias during the first 4 h after myocardial infarction (MI) in anesthetized rats. Male Wistar rats were implanted with catheters into the femoral artery and vein for AP recordings and drug administration. Rats received the autonomic receptor blockers methyl-atropine (1 mg/kg iv) and propranolol (2 mg/kg iv) at intervals of 15 min, 1 h after saline ( n = 16) or PYR (0.25 mg/kg iv, n = 18), to indirectly assess sympathovagal balance. Acute treatment with PYR increased cardiac vagal (86 ± 7 vs. 44 ± 5 beats/min) and decreased sympathetic tone (−31 ± 8 vs. −69 ± 7 beats/min). Different animals were implanted with ECG electrodes and catheters. A large MI was induced via left coronary artery ligation after basal recordings. Rats received PYR ( n = 14) or saline ( n = 14) 10–15 min after MI, and the recordings lasted up to 4 h. In part of the animals, hearts were removed for connexin43 quantification after all procedures. MI elicited a fall in AP (−45 ± 5 mmHg), a progressive rise in HR (26 ± 14 beats/min), and an increase in corrected QT interval (33 ± 13 ms). PYR elicited a prompt bradycardia (−50 ± 14 beats/min) that returned to basal levels over time, and it prevented the lengthening of the corrected QT interval. Treatment with PYR increased by ∼20% the occurrence of rats free of arrhythmias after MI. MI markedly decreased connexin43 in left ventricles, and PYR treatment partially prevented this decrease.
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Affiliation(s)
- Fernanda Machado Santos-Almeida
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; and
| | - Henrique Girão
- Institute of Biomedical Imaging and Life Sciences, School of Medicine, University of Coimbra, Coimbra, Portugal
| | - Carlos Alberto Aguiar da Silva
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; and
| | - Helio Cesar Salgado
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; and
| | - Rubens Fazan
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; and
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24
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Grippo AJ, Moffitt JA, Henry MK, Firkins R, Senkler J, McNeal N, Wardwell J, Scotti MAL, Dotson A, Schultz R. Altered Connexin 43 and Connexin 45 protein expression in the heart as a function of social and environmental stress in the prairie vole. Stress 2015; 18:107-14. [PMID: 25338193 PMCID: PMC4675659 DOI: 10.3109/10253890.2014.979785] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Exposure to social and environmental stressors may influence behavior as well as autonomic and cardiovascular regulation, potentially leading to depressive disorders and cardiac dysfunction including elevated sympathetic drive, reduced parasympathetic function, and ventricular arrhythmias. The cellular mechanisms that underlie these interactions are not well understood. One mechanism may involve alterations in the expression of Connexin43 (Cx43) and Connexin45 (Cx45), gap junction proteins in the heart that play an important role in ensuring efficient cell-to-cell coupling and the maintenance of cardiac rhythmicity. The present study investigated the hypothesis that long-term social isolation, combined with mild environmental stressors, would produce both depressive behaviors and altered Cx43 and Cx45 expression in the left ventricle of prairie voles - a socially monogamous rodent model. Adult, female prairie voles were exposed to either social isolation (n = 22) or control (paired, n = 23) conditions (4 weeks), alone or in combination with chronic mild stress (CMS) (1 week). Social isolation, versus paired control conditions, produced significantly (p < 0.05) increased depressive behaviors in a 5-min forced swim test, and CMS exacerbated (p < 0.05) these behaviors. Social isolation (alone) reduced (p < 0.05) total Cx43 expression in the left ventricle; whereas CMS (but not isolation) increased (p < 0.05) total Cx45 expression and reduced (p < 0.05) the Cx43/Cx45 ratio, measured via Western blot analysis. The present findings provide insight into potential cellular mechanisms underlying altered cardiac rhythmicity associated with social and environmental stress in the prairie vole.
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Affiliation(s)
- Angela J. Grippo
- Department of Psychology, Northern Illinois University, DeKalb, IL
| | - Julia A. Moffitt
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA
- Department of Kinesiology, St. Ambrose University, Davenport, IA
| | - Matthew K. Henry
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA
| | - Rachel Firkins
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA
| | - Jonathan Senkler
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA
| | - Neal McNeal
- Department of Psychology, Northern Illinois University, DeKalb, IL
| | - Joshua Wardwell
- Department of Psychology, Northern Illinois University, DeKalb, IL
| | - Melissa-Ann L. Scotti
- Department of Psychology, Northern Illinois University, DeKalb, IL
- Department of Psychiatry and Brain-Body Center, University of Illinois at Chicago, Chicago, IL
| | - Ashley Dotson
- Department of Psychology, Northern Illinois University, DeKalb, IL
| | - Rachel Schultz
- Department of Psychology, Northern Illinois University, DeKalb, IL
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25
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Harvey KL, Hussain A, Maddock HL. Ipratropium bromide-mediated myocardial injury in in vitro models of myocardial ischaemia/reperfusion. Toxicol Sci 2014; 138:457-67. [PMID: 24431217 DOI: 10.1093/toxsci/kfu001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ipratropium bromide, a nonselective muscarinic antagonist, is widely prescribed for the treatment of chronic obstructive pulmonary disease (COPD). Analyses of COPD patients, with underlying ischaemic heart disease, receiving anticholinergics, have indicated increased risk of severity and occurrence of cardiovascular events (including myocardial infarction). The present study explored whether ipratropium bromide induces myocardial injury in nonclinical models of simulated myocardial ischaemia/reperfusion injury. Adult Sprague Dawley rat hearts/primary ventricular myocytes were exposed to simulated ischaemia/hypoxia prior to administration of ipratropium at the onset of reperfusion/reoxygenation. Infarct to risk ratio and cell viability was measured via triphenyl tetrazolium chloride staining and thiazolyl blue tetrazolium bromide (MTT) assay. The involvement of apoptosis and necrosis was evaluated by flow cytometry. Mitochondrial-associated responses were detected by tetramethylrhodamine methyl ester fluorescence and myocyte contracture. Ipratropium (1 × 10⁻¹¹ M - 1 × 10⁻⁴ M) significantly increased infarct/risk ratio and decreased cell viability in a dose-dependent manner. Increased levels of necrosis and apoptosis were observed via flow cytometry, accompanied by increased levels of cleaved caspase-3 following ipratropium treatment. Levels of endogenous myocardial acetylcholine were verified via use of an acetylcholine assay. In these experimental models, exogenous acetylcholine (1 × 10⁻⁷ M) showed protective properties, when administered alone, as well as abrogating the exacerbation of myocardial injury during ischaemia/reperfusion following ipratropium coadministration. In parallel experiments, under conditions of myocardial ischaemia/reperfusion, a similar injury was observed following atropine (1 × 10⁻⁷ M) administration. These data demonstrate for the first time in a nonclinical setting that ipratropium exacerbates ischaemia/reperfusion injury via apoptotic- and necrotic-associated pathways.
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Affiliation(s)
- Kate L Harvey
- Department of Biomolecular and Sports Sciences, Coventry University, Cox Street, Coventry, CV1 5FB, UK
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26
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Zhao Y, Wang C, Wu J, Wang Y, Zhu W, Zhang Y, Du Z. Choline protects against cardiac hypertrophy induced by increased after-load. Int J Biol Sci 2013; 9:295-302. [PMID: 23493786 PMCID: PMC3596715 DOI: 10.7150/ijbs.5976] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 02/26/2013] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Although inadequate intake of essential nutrient choline has been known to significantly increase cardiovascular risk, whether additional supplement of choline offering a protection against cardiac hypertrophy remain unstudied. METHODS The effects of choline supplements on pathological cardiac hypertrophic growth induced by transverse aorta constriction (TAC) for three weeks and cardiomyocyte hypertrophy in cultured cells induced by isoproterenol (ISO) 10 μM for 48 h stimulation were investigated. Western blot analysis and real-time PCR were used to determine the expression of ANP, BNP, β-MHC, miR-133a and Calcineurin. RESULTS Administration of 14 mg/kg choline to mice undergone TAC effectively attenuated the cardiac hypertrophic responses, as indicated by the reduced heart weight, left ventricular weight, ventricular thickness, and reduced expression of biomarker genes of cardiac hypertrophy. This anti-hypertrophic efficacy was reproduced in a cellular model of cardiomyocyte hypertrophy induced by isoproterenol in cultured neonatal cardiomyocytes. Our results further showed that choline rescued the aberrant downregulation of the muscle-specific microRNA miR-133a expression, a recently identified anti-hypertrophic factor, and restored the elevated calcineurin protein level, the key signaling molecule for the development of cardiac hypertrophy. These effects of choline were abolished by the M3 mAChR-specific antagonist 4-DAMP. CONCLUSION Our study unraveled for the first time the cardioprotection of choline against cardiac hypertrophy, with correction of expression of miR-133a and calcineurin as a possible mechanism. Our findings suggest that choline supplement may be considered for adjunct anti-hypertrophy therapy.
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Affiliation(s)
- Yilei Zhao
- Institute of Clinical Pharmacology, the Second Affiliated Hospital of Harbin Medical University, China
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27
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Moffitt JA, Henry MK, Welliver KC, Jepson AJ, Garnett ER. Hindlimb unloading results in increased predisposition to cardiac arrhythmias and alters left ventricular connexin 43 expression. Am J Physiol Regul Integr Comp Physiol 2013; 304:R362-73. [PMID: 23302960 DOI: 10.1152/ajpregu.00391.2012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hindlimb unloading (HU) is a well-established animal model of cardiovascular deconditioning. Previous data indicate that HU results in cardiac sympathovagal imbalance. It is well established that cardiac sympathovagal imbalance increases the risk for developing cardiac arrhythmias. The cardiac gap junction protein connexin 43 (Cx43) is predominately expressed in the left ventricle (LV) and ensures efficient cell-to-cell electrical coupling. In the current study we wanted to test the hypothesis that HU would result in increased predisposition to cardiac arrhythmias and alter the expression and/or phosphorylation of LV-Cx43. Electrocardiographic data using implantable telemetry were obtained over a 10- to 14-day HU or casted control (CC) condition and in response to a sympathetic stressor using isoproterenol administration and brief restraint. The arrhythmic burden was calculated using a modified scoring system to quantify spontaneous and provoked arrhythmias. In addition, Western blot analysis was used to measure LV-Cx43 expression in lysates probed with antibodies directed against the total and an unphosphorylated form of Cx43 in CC and HU rats. HU resulted in a significantly greater total arrhythmic burden during the sympathetic stressor with significantly more ventricular arrhythmias occurring. In addition, there was increased expression of total LV-Cx43 observed with no difference in the expression of unphosphorylated LV-Cx43. Specifically, the increased expression of LV-Cx43 was consistent with the phosphorylated form. These data taken together indicate that cardiovascular deconditioning produced through HU results in increased predisposition to cardiac arrhythmias and increased expression of phosphorylated LV-Cx43.
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Affiliation(s)
- Julia A Moffitt
- Department of Physiology and Pharmacology, Des Moines University, 3200 Grand Ave., Des Moines, IA 50312, USA.
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28
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Wang S, Han HM, Pan ZW, Hang PZ, Sun LH, Jiang YN, Song HX, Du ZM, Liu Y. Choline inhibits angiotensin II-induced cardiac hypertrophy by intracellular calcium signal and p38 MAPK pathway. Naunyn Schmiedebergs Arch Pharmacol 2012; 385:823-31. [PMID: 22569796 DOI: 10.1007/s00210-012-0740-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 02/07/2012] [Indexed: 02/07/2023]
Abstract
Choline, an agonist of M(3) muscarinic acetylcholine receptors, is a precursor and metabolite of acetylcholine and is also a functional modulator of cellular membrane. However, the effect of choline on cardiac hypertrophy is not fully understood. The present study was therefore designed to explore whether choline could prevent cardiac hypertrophy induced by angiotensin II (Ang II) and clarify its potential mechanisms. Cardiac hypertrophy was induced by 0.6 mg kg(-1) day(-1) Ang II for 2 weeks in the presence or absence of choline pretreatment, while cardiomyocyte hypertrophy was induced by Ang II 0.1 μM for 48 h. We found that choline pretreatment attenuated the increment cell size of cardiomyocytes induced by Ang II both in vivo and in vitro. The high ANP and β-MHC levels induced by Ang II were also reversed by choline in cardiomyocytes. Meanwhile, choline pretreatment prevented the augment of reactive oxygen species (ROS) and intracellular calcium concentration in Ang II-treated cardiomyocytes. Furthermore, the upregulated phospho-p38 mitogen-activated protein kinase (MAPK) and calcineurin levels by Ang II in ventricular myocytes were attenuated by choline. In conclusion, choline prevents Ang II-induced cardiac hypertrophy through inhibition of ROS-mediated p38 MAPK activation as well as regulation of Ca(2+)-mediated calcineurin signal transduction pathway. Our results provide new insights into the pharmacological role of choline in cardiovascular diseases.
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Affiliation(s)
- Shu Wang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), Harbin Medical University, Harbin, Heilongjiang 150081, People's Republic of China
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29
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The involvement of gap junctions in the delayed phase of the protection induced by cardiac pacing in dogs. Clin Sci (Lond) 2012; 123:39-51. [DOI: 10.1042/cs20110501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study has examined the role of GJ (gap junctions) in the delayed anti-arrhythmic effect of cardiac pacing, with particular reference to the time-course changes in Cx43 (connexin43) expression both after pacing (4×5 min, at a rate of 240 beats/min) and 24 h later, when the dogs were subjected to a 25 min occlusion and reperfusion of the LAD (left anterior descending coronary artery). Compared with the SP (sham-paced) controls (n=20), in dogs paced 24 h previously (n=16) there were reductions in arrhythmia severity [e.g. number of VPB (ventricular premature beats) during occlusion 294±78 compared with 63±25; survival from the combined ischaemia/reperfusion insult 20% compared with 78%], and in other ischaemic changes [epicardial ST-segment, TAT (total activation time) and tissue impedance]. Pacing also prevented the ischaemia-induced structural impairment of the intercalated discs, and preserved GJ permeability and Cx43 phosphorylation, without modifying Cx43 protein content. Following cardiac pacing the membrane and total Cx43 protein contents were unchanged up to 6 h, but were significantly reduced 12 h later (preceded by a down-regulation of Cx43 mRNA at 6 h), and returned to normal by 24 h. Interestingly, dogs that were subjected to ischaemia 12 h after cardiac pacing showed increased arrhythmia generation. We conclude that cardiac pacing results in time-dependent changes in Cx43 expression, which may alter GJ function and influence arrhythmia generation during a subsequent ischaemia/reperfusion insult. This effect is manifested in protection 24 h after pacing, but of potential clinical interest is the finding that there is a time interval after pacing during which an ischaemic event may generate severe ventricular arrhythmias.
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Abramochkin DV, Tapilina SV, Sukhova GS, Nikolsky EE, Nurullin LF. Functional M3 cholinoreceptors are present in pacemaker and working myocardium of murine heart. Pflugers Arch 2012; 463:523-9. [PMID: 22350728 DOI: 10.1007/s00424-012-1075-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 01/17/2012] [Accepted: 01/23/2012] [Indexed: 11/27/2022]
Abstract
The presence of M3 cholinoreceptors and their role in mediation of action potential waveform modulation were determined by immunolabeling of receptor proteins and standard microelectrode technique, respectively. The sinoatrial node (SAN), which was determined as a connexin 43 negative area within the intercaval region, the surrounding atrial tissue, and the working ventricular myocardium exhibited labeling of both M3 and M2 receptors. However, the density of M3 and M2 labeling was about twofold higher in the SAN compared to working myocardium. The stimulation of M3 receptors was obtained by application of nonselective M1 and M3 muscarinic agonist pilocarpine (10(-5) M) in the presence of selective M2 blocker methoctramine (10(-7) M). Stimulation of M3 receptors provoked marked shortening of action potential duration in atrial and ventricular working myocardium. In the SAN, M3 stimulation leads to a significant reduction of sinus rhythm rate accompanied with slowing of diastolic depolarization and increase of action potential upstroke velocity. All electrophysiological effects of selective M3 stimulation were suppressed by specific blocker of M3 receptors 4-DAMP (10(-8) M). We conclude that M3 cholinoreceptors are present in pacemaker and working myocardium of murine heart, where they mediate negative cholinergic effects: slowing of sinus rhythm and shortening of action potentials.
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Affiliation(s)
- Denis V Abramochkin
- Department of Human and Animal Physiology, Moscow State University, Leninskiye Gory 1, Moscow, Russia.
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Benes J, Novakova M, Rotkova J, Farar V, Kvetnansky R, Riljak V, Myslivecek J. Beta3 Adrenoceptors Substitute the Role of M2 Muscarinic Receptor in Coping with Cold Stress in the Heart: Evidence from M2KO Mice. Cell Mol Neurobiol 2012; 32:859-69. [DOI: 10.1007/s10571-011-9781-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 12/03/2011] [Indexed: 01/22/2023]
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